Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Which of the following equations represents a circle? a)
x
2
−
y
2
+
4
=
0
x^2 - y^2 + 4 = 0
x
2
−
y
2
+
4
=
0
b)
2
x
2
+
2
y
2
+
4
x
y
−
5
=
0
2x^2 + 2y^2 + 4xy - 5 = 0
2
x
2
+
2
y
2
+
4
x
y
−
5
=
0
c)
3
x
2
+
3
y
2
+
4
x
−
5
y
+
2
=
0
3x^2 + 3y^2 + 4x - 5y + 2 = 0
3
x
2
+
3
y
2
+
4
x
−
5
y
+
2
=
0
d)
x
2
+
2
y
2
+
3
x
−
4
y
+
1
=
0
x^2 + 2y^2 + 3x - 4y + 1 = 0
x
2
+
2
y
2
+
3
x
−
4
y
+
1
=
0
Browse the problem library